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16 Cards in this Set
- Front
- Back
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Sprinkler heads should be |
The same type |
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Solenoid valves are shut off at |
Control panel |
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The number of heads is determined by static pressure and |
Their flow rates of head |
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Sprinkler systems use what voltage |
Low voltage 24V |
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To prevent back syphonage in commercial installations what must be installed |
A DCVA or RP if chemicals are used |
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To protect lines from freezing they should be |
Graded to a drain or blown out with compressed air |
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Which heads should be used with a flower bed |
Bubbler |
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The most common piping used is |
PVC Polyethylene |
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To prevent the system from turning on use a |
Rain water sensor |
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Impulse heads have a radius of |
15 to 20ft |
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Lines for commercial installation should be buried at between |
12-18in |
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To prevent backflow on residential installations what should be installed |
Double check valve |
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Control valves maybe either |
Manual Electronic |
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Polyethylene pipe should be a minimum series |
Series 75 |
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Joining methods can be either |
Insert fittings and clamps Mechanical joints |
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The bury depth for residential piping is |
6-12in |
